return ret;
}
+#ifdef CONFIG_RK_USB_UART
+/**
+ * dwc_otg_uart_enabled - check if a usb-uart bypass func is enabled in DT
+ *
+ * Returns true if the status property of node "usb_uart" is set to "okay"
+ * or "ok", if this property is absent it will use the default status "ok"
+ * 0 otherwise
+ */
+static bool dwc_otg_uart_enabled(void)
+{
+ struct device_node *np;
+
+ np = of_find_node_by_name(NULL, "usb_uart");
+ if (np && of_device_is_available(np))
+ return true;
+
+ return false;
+}
+
static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
{
-#ifdef CONFIG_RK_USB_UART
- if (1 == enter_usb_uart_mode) {
+ if ((1 == enter_usb_uart_mode) && dwc_otg_uart_enabled()) {
/* bypass dm, enter uart mode */
- writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12),
- RK_GRF_VIRT + RK3036_GRF_UOC1_CON4);
+ writel(UOC_HIWORD_UPDATE(0x3, 0x3, 12), RK_GRF_VIRT +
+ RK3036_GRF_UOC1_CON4);
} else if (0 == enter_usb_uart_mode) {
/* enter usb mode */
- writel(UOC_HIWORD_UPDATE(0x0, 0x3, 12),
- RK_GRF_VIRT + RK3036_GRF_UOC1_CON4);
+ writel(UOC_HIWORD_UPDATE(0x0, 0x3, 12), RK_GRF_VIRT +
+ RK3036_GRF_UOC1_CON4);
}
-#endif
}
+#else
+static void dwc_otg_uart_mode(void *pdata, int enter_usb_uart_mode)
+{
+}
+#endif
static void usb20otg_power_enable(int enable)
{